Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years
New high resolution sea surface temperature (SST) and sea surface salinity (SSS) estimates are presented from the Agulhas Bank slope in the Atlantic sector of the Agulhas Corridor using planktic foraminiferal (Globigerinoides ruber) δ18O and Mg/Ca derived SST. By focusing on the last 80,000 years th...
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American Geophysical Union
2014
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Online Access: | https://orca.cardiff.ac.uk/id/eprint/68273/ https://doi.org/10.1002/2014PA002698 |
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ftunivcardiff:oai:https://orca.cardiff.ac.uk:68273 2023-05-15T16:29:22+02:00 Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years Dyez, Kelsey A. Zahn, Rainer Hall, Ian Richard 2014-12-01 https://orca.cardiff.ac.uk/id/eprint/68273/ https://doi.org/10.1002/2014PA002698 unknown American Geophysical Union Dyez, Kelsey A., Zahn, Rainer and Hall, Ian Richard https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419 2014. Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years. Paleoceanography 29 (12) , pp. 1238-1248. 10.1002/2014PA002698 https://doi.org/10.1002/2014PA002698 doi:10.1002/2014PA002698 GC Oceanography QH Natural history Article PeerReviewed 2014 ftunivcardiff https://doi.org/10.1002/2014PA002698 2022-10-27T22:41:14Z New high resolution sea surface temperature (SST) and sea surface salinity (SSS) estimates are presented from the Agulhas Bank slope in the Atlantic sector of the Agulhas Corridor using planktic foraminiferal (Globigerinoides ruber) δ18O and Mg/Ca derived SST. By focusing on the last 80,000 years this is the first fine-scale Agulhas leakage record that overlaps in time with much of the Greenland ice core record of abrupt climate changes in the North Atlantic region. The multi-centennial profiles indicate instances of warm SST and/or increased SSS coincident with Northern Hemisphere cool periods, followed by Northern Hemisphere warming. These periods of enhanced SST and SSS in the Agulhas Corridor occur at the last glacial termination (T1) and during North Atlantic cold episodes associated with Heinrich (H) meltwater events. To a first-order approximation, the timing of maximal salinity events in relation to periods of North Atlantic freshwater perturbation is consistent with the concept suggested by climate models that enhanced Agulhas leakage provides for buoyancy compensation and can potentially trigger increased convective activity in the North Atlantic, thereby restoring Atlantic overturning circulation after relatively weak states. Article in Journal/Newspaper Greenland Greenland ice core ice core North Atlantic Cardiff University: ORCA (Online Research @ Cardiff) Greenland Paleoceanography 29 12 1238 1248 |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
unknown |
topic |
GC Oceanography QH Natural history |
spellingShingle |
GC Oceanography QH Natural history Dyez, Kelsey A. Zahn, Rainer Hall, Ian Richard Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
topic_facet |
GC Oceanography QH Natural history |
description |
New high resolution sea surface temperature (SST) and sea surface salinity (SSS) estimates are presented from the Agulhas Bank slope in the Atlantic sector of the Agulhas Corridor using planktic foraminiferal (Globigerinoides ruber) δ18O and Mg/Ca derived SST. By focusing on the last 80,000 years this is the first fine-scale Agulhas leakage record that overlaps in time with much of the Greenland ice core record of abrupt climate changes in the North Atlantic region. The multi-centennial profiles indicate instances of warm SST and/or increased SSS coincident with Northern Hemisphere cool periods, followed by Northern Hemisphere warming. These periods of enhanced SST and SSS in the Agulhas Corridor occur at the last glacial termination (T1) and during North Atlantic cold episodes associated with Heinrich (H) meltwater events. To a first-order approximation, the timing of maximal salinity events in relation to periods of North Atlantic freshwater perturbation is consistent with the concept suggested by climate models that enhanced Agulhas leakage provides for buoyancy compensation and can potentially trigger increased convective activity in the North Atlantic, thereby restoring Atlantic overturning circulation after relatively weak states. |
format |
Article in Journal/Newspaper |
author |
Dyez, Kelsey A. Zahn, Rainer Hall, Ian Richard |
author_facet |
Dyez, Kelsey A. Zahn, Rainer Hall, Ian Richard |
author_sort |
Dyez, Kelsey A. |
title |
Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_short |
Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_full |
Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_fullStr |
Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_full_unstemmed |
Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years |
title_sort |
multi-centennial agulhas leakage variability and links to north atlantic climate during the past 80,000 years |
publisher |
American Geophysical Union |
publishDate |
2014 |
url |
https://orca.cardiff.ac.uk/id/eprint/68273/ https://doi.org/10.1002/2014PA002698 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Greenland ice core ice core North Atlantic |
genre_facet |
Greenland Greenland ice core ice core North Atlantic |
op_relation |
Dyez, Kelsey A., Zahn, Rainer and Hall, Ian Richard https://orca.cardiff.ac.uk/view/cardiffauthors/A002402L.html orcid:0000-0001-6960-1419 orcid:0000-0001-6960-1419 2014. Multi-centennial Agulhas leakage variability and links to North Atlantic climate during the past 80,000 years. Paleoceanography 29 (12) , pp. 1238-1248. 10.1002/2014PA002698 https://doi.org/10.1002/2014PA002698 doi:10.1002/2014PA002698 |
op_doi |
https://doi.org/10.1002/2014PA002698 |
container_title |
Paleoceanography |
container_volume |
29 |
container_issue |
12 |
container_start_page |
1238 |
op_container_end_page |
1248 |
_version_ |
1766019056758947840 |